等离子喷涂设备抗干扰问题的研究  

Investigation of anti-high-frequency interference in PLC controlled plasma spraying equipment

作　　者：屈伸[1] 王赫莹[1] 赵春元[2] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110023 [2]沈阳工程学院机械系,沈阳110036

出　　处：《沈阳工业大学学报》2005年第2期159-161,共3页Journal of Shenyang University of Technology

摘　　要：等离子喷涂设备的高频引弧器是对PLC系统和设备元件构成强大威胁的干扰源,阐述了高频干扰的主要现象,探讨了解决干扰的一些措施.实验发现,等离子喷涂设备在起弧瞬间的工作电流骤升至近千安培.另外强电场干扰也是导致设备不能稳定工作的一个因素.实验表明,将高频电源与共用电源分离、改变控制电路以及在PLC和硅触发器电源线路上加滤波器等措施有效地抑制了高频引弧器对PLC系统和设备元件的破坏性干扰,确保了PLC系统实时控制的稳定性和可靠性.The high-frequency igniter in plasma spraying equipment is a severe source of interference to the PLC system and electronic components integrated into the equipment.Therefor,the main phenomena (concerning) high-frequency interferenceis narrated and some anti-interferenc measures are developed.As (discovered) from experiments,the work current of plasma spraying equipment went abruptly up to 1000A at the moment of starting arc.In addition,the interfere from strong electric field was also a factor resulting in unstable work of the equipment.Experimental results showed that separating the high-frequency electrical source from the common electrical source,changing control circuits and adding the filter between the PLC and silicon trigger can effectively inhibit destructive interference of high-frequency igniter on PLC system and electronic components in theequipment and ensure the stability and reliability of PLC system real-time control.

关 键 词：等离子喷涂设备 高频干扰 PLC自动控制 稳定性 可靠性 

分 类 号：TG456.2[金属学及工艺—焊接]